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You searched for: creator:"asher"
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[audio]Change Gone Come - Asher
Asher
Keywords: Asher
Downloads: 52
[unknown]Miniatures - Asher

Downloads: 6
[audio]In Camera - Asher
"Conceived and recorded spring 2007 in somerville, ma. mastered by m.a. tolosa. image by asher thal-nir."
Downloads: 21
[audio]Asher - and invariably the blue [cnv 22] - asher
The well known fact of the Inuits having access to more than 13 (or was it 30?) terms for 'snow' comes to mind on the apperception of this release. As the title already hints at, these tracks appear to represent a spectrum of blue both more wide and deep than ordinary english can communicate. A blue note resounding from the movement of the spheres, this is a buddhist blue - a deep-listening experience into melancholy; the sonic aura of the qualified nothingness at the essence of illumination...
Keywords: lowercase
Downloads: 1,260 5.00 out of 5 stars5.00 out of 5 stars5.00 out of 5 stars5.00 out of 5 stars5.00 out of 5 stars(3 reviews)
[texts]Supplement to the volume of collected writings, etc. - Asher, Asher, 1837-1889

Downloads: 142
[texts]Delayed choice for entanglement swapping - Asher Peres
Two observers (Alice and Bob) independently prepare two sets of singlets. They test one particle of each singlet along an arbitrarily chosen direction and send the other particle to a third observer, Eve. At a later time, Eve performs joint tests on pairs of particles (one from Alice and one from Bob). According to Eve's choice of test and to her results, Alice and Bob can sort into subsets the samples that they have already tested, and they can verify that each subset behaves as if it consisted...
Downloads: 1
[texts]The Stability of Lorentzian Space-Time - Asher Yahalom
It is stated in many text books that the any metric appearing in general relativity should be locally Lorentzian i.e. of the type $\eta_\mn = {\rm diag} (1,-1,-1,-1)$ this is usually presented as an independent axiom of the theory, which can not be deduced from other assumptions. In this work we show that the above assertion is a consequence of a standard stability analysis of the Einstein \eqs and need not be assumed.
Downloads: 2
[audio]Winter 2008 - Asher Woodworth
MixCD made in Venice, CA - Winter 08
Keywords: asher; woodworth
Downloads: 83
[texts]Bayesian analysis of Bell inequalities - Asher Peres
Statistical tests are needed to determine experimentally whether a hypothetical theory based on local realism can be an acceptable alternative to quantum mechanics. It is impossible to rule out local realism by a single test, as often claimed erroneously. The ``strength'' of a particular Bell inequality is measured by the number of trials that are needed to invalidate local realism at a given confidence level...
Downloads: 2
[texts]Unitary dynamics for quantum codewords - Asher Peres
A quantum codeword is a redundant representation of a logical qubit by means of several physical qubits. It is constructed in such a way that if one of the physical qubits is perturbed, for example if it gets entangled with an unknown environment, there still is enough information encoded in the other physical qubits to restore the logical qubit, and disentangle it from the environment. The recovery procedure may consist of the detection of an error syndrome, followed by the correction of the er...
Downloads: 2
[texts]Quantum information and general relativity - Asher Peres
The Einstein-Podolsky-Rosen paradox (1935) is reexamined in the light of Shannon's information theory (1948). The EPR argument did not take into account that the observers' information was localized, like any other physical object. General relativity introduces new problems: there are horizons which act as one-way membranes for the propagation of quantum information, in particular black holes which act like sinks.
Downloads: 2
[texts]I am the cat who walks by himself - Asher Peres
The city of lions. Beaulieu-sur-Dordogne. The war starts. Drole de guerre. Going to work. Going to school. Fleeing from village to village. Playing cat and mouse. The second landing. Return to Beaulieu. Return to Paris. Joining the boyscouts. Learning languages. Israel becomes independent. Arrival in Haifa. Kalay high school. Military training. The Hebrew Technion in Haifa. Relativity. Asher Peres...
Downloads: 5
[texts]Remarks on the Milnor conjecture over schemes - Asher Auel
The Milnor conjecture has been a driving force in the theory of quadratic forms over fields, guiding the development of the theory of cohomological invariants, ushering in the theory of motivic cohomology, and touching on questions ranging from sums of squares to the structure of absolute Galois groups. Here, we survey some recent work on generalizations of the Milnor conjecture to the context of schemes (mostly smooth varieties over fields of characteristic not 2)...
Downloads: 4
[texts]Surjectivity of the total Clifford invariant and Brauer dimension - Asher Auel
Merkurjev's theorem---the statement that the 2-torsion of the Brauer group is represented by Clifford algebras of quadratic forms---is in general false when the base is no longer a field. The work of Parimala, Scharlau, and Sridharan proves the existence of smooth complete curves over local fields, over which Merkurjev's theorem is equivalent to the existence of a rational theta characteristic. Here, we prove that on regular curves over local fields or surfaces over finite fields, replacing the ...
Downloads: 4
[texts]In Search of the Forty Days Road - Asher, Michael
A classic travel-writing piece originally published in the 1980s. This is a record of Michael Asher's journey through Chad and the Sudan by camel, in an attempt to trace the Forty Days Road, an ancient trade route.
Downloads: 2
[texts]All the Bell inequalities - Asher Peres
Bell inequalities are derived for any number of observers, any number of alternative setups for each one of them, and any number of distinct outcomes for each experiment. It is shown that if a physical system consists of several distant subsystems, and if the results of tests performed on the latter are determined by local variables with objective values, then the joint probabilities for triggering any given set of distant detectors are convex combinations of a finite number of Boolean arrays, w...
Downloads: 1
[texts]Chaotic Evolution in Quantum Mechanics - Asher Peres
A quantum system is described, whose wave function has a complexity which increases exponentially with time. Namely, for any fixed orthonormal basis, the number of components required for an accurate representation of the wave function increases exponentially.
Downloads: 1
[audio]Winter2008 - Asher Woodworth
MixCD created in Venice, CA 2008
Keywords: asher; woodworth; mix
Downloads: 41
[texts]PP-WAVES (the original article) - Asher Peres
PP-waves have recently been of interest to string theorists. This is the original, hard to find, original article on plane polarized gravitational waves.
Downloads: 2
[texts]What is actually teleported? - Asher Peres
There are no ``unknown quantum states.'' It's a contradiction in terms. Moreover, Alice and Bob are only inanimate objects. They know nothing. What is teleported instantaneously from one system (Alice) to another system (Bob) is the applicability of the preparer's knowledge to the state of a particular qubit in these systems. The operation necessitates dual classical and quantum channels. Other examples of dual transmission, including ``unspeakable information,'' will be presented and discussed...
Downloads: 2
[texts]Bell Inequalities with Postselection - Asher Peres
Experimental tests of Bell inequalities ought to take into account all detection events. If the latter are postselected, and only some of these events are included in the statistical analysis, a Bell inequality may be violated, even by purely classical correlations. The paradoxical properties of Werner states, recently pointed out by Popescu, can be explained as the result of a postselection of the detection events, or, equivalently, as due to the preparation of a new state by means of a nonloca...
Downloads: 1
[texts]Quantum nonlocality and inseparability - Asher Peres
A quantum system consisting of two subsystems is separable if its density matrix can be written as $\rho=\sum w_K \rho_K'\otimes \rho_K''$, where $\rho_K'$ and $\rho_K''$ are density matrices for the two subsytems, and the positive weights $w_K$ satisfy $\sum w_K=1$. A necessary condition for separability is derived and is shown to be more sensitive than Bell's inequality for detecting quantum inseparability...
Downloads: 2
[texts]Impossible Journey - Asher, Michael
A great read-to-and-discuss book and a fun accessible reader for children from five years up. Author's and illustrator's royalties all go to the Trust for African Schools.
Keywords: cando media; Africa
Downloads: 2
[texts]Finite precision measurement nullifies Euclid's postulates - Asher Peres
Following Meyer's argument (quant-ph/9905080) the set of all directions in space is replaced by the dense subset of rational directions. The result conflicts with Euclidean geometry.
Downloads: 1
[texts]A Desert Dies - Asher, Michael
A Desert Dies chronicles Michael Asher's life with desert communities in the Sahara over three drought-filled years. While Michael came to appreciate the allure of a nomadic life in isolation he also saw how the perennial failure of rains devastated the way of life of even the hardiest of residents.
Keywords: cando media; Africa
Downloads: 1
[unknown]Unconditional Love - Marlon Asher

Downloads: 6
[texts]Variability of fundamental constants - Asher Peres
If the fine structure constant is not really constant, is this due to a variation of $e$, $\hbar$, or $c$? It is argued that the only reasonable conclusion is a variable speed of light.
Downloads: 1
[texts]Collective tests for quantum nonlocality - Asher Peres
Pairs of spin-1/2 particles are prepared in a Werner state (namely, a mixture of singlet and random components). If the random component is large enough, the statistical results of spin measurements that may be performed on each pair separately can be reproduced by an algorithm involving local ``hidden'' variables. However, if several such pairs are tested simultaneously, a violation of the Clauser-Horne-Shimony-Holt inequality may occur, and no local hidden variable model is compatible with the...
[texts]Universalist Belief: Or the Doctrinal Views of Universalists - Asher Moore
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 48
[texts]Einstein, Podolsky, Rosen, and Shannon - Asher Peres
The EPR paradox (1935) is reexamined in the light of Shannon's information theory (1948). The EPR argument did not take into account that the observers' information was localized, like any other physical object.
Downloads: 5
[texts]Separability Criterion for Density Matrices - Asher Peres
A quantum system consisting of two subsystems is separable if its density matrix can be written as $\rho=\sum_A w_A\,\rho_A'\otimes\rho_A''$, where $\rho_A'$ and $\rho_A''$ are density matrices for the two subsytems. In this Letter, it is shown that a necessary condition for separability is that a matrix, obtained by partial transposition of $\rho$, has only non-negative eigenvalues. This criterion is stronger than Bell's inequality.
Downloads: 9
[texts]Opposite momenta lead to opposite directions - Asher Peres
When a particle decays into two fragments, the wavefunctions of the latter are spherical shells with expanding radii. In spite of this spherical symmetry, the two particles can be detected only in opposite directions.
Downloads: 7
[texts]A Four Function Variational Principle for Barotropic Magnetohydrodynamics - Asher Yahalom
Variational principles for magnetohydrodynamics were introduced by previous authors both in Lagrangian and Eulerian form. In a previous work Yahalom & Lynden-Bell introduced a simpler Eulerian variational principles from which all the relevant equations of magnetohydrodynamics can be derived. The variational principle was given in terms of six independent functions for non-stationary flows and three independent functions for stationary flows...
Downloads: 7
[texts]Higher order Schmidt decompositions - Asher Peres
Necessary and sufficient conditions are given for the existence of extended Schmidt decompositions, with more than two subspaces.
Downloads: 12
[texts]Helicity Conservation via the Noether Theorem - Asher Yahalom
The conservation of helicity in ideal barotropic fluids is discussed from a group theoretical point of view. A new symmetry group is introduced i.e. the alpha group of translations. It is proven via the Noether theorem that this group generates helicity conservation.
Downloads: 19
[texts]The Use of the Correspondence Method in Original Research (Volume 15) - Hobson, Asher
"The Use of the Correspondence Method in Original Research" is an article from Publications of the American Statistical Association, Volume 15. View more articles from Publications of the American Statistical Association.View this article on JSTOR.View this article's JSTOR metadata.You may also retrieve all of this items metadata in JSON at the following URL: https://archive.org/metadata/jstor-2965113
Downloads: 18
[texts]A Kurosh-Type Theorem for Type III Factors - Jason Asher
We prove a generalization of N. Ozawa's Kurosh-type theorem to the setting of free products of semiexact II_1 factors with respect to arbitrary (non-tracial) faithful normal states. We are thus able to distinguish certain resulting type III factors. For example, if M = LF_n \otimes LF_m and {\phi_i} is any sequence of faithful normal states on M, then the l-various (M,\phi_1) * ... * (M,\phi_l) are all mutually non-isomorphic.
Downloads: 2
[texts]Farmers' Co-Operative Associations: Their Legal and Legislative Aspects (Volume 11) - Hobson, Asher
"Farmers' Co-Operative Associations: Their Legal and Legislative Aspects" is an article from The American Economic Review, Volume 11. View more articles from The American Economic Review.View this article on JSTOR.View this article's JSTOR metadata.You may also retrieve all of this items metadata in JSON at the following URL: https://archive.org/metadata/jstor-1808658
Downloads: 11
[texts]Universalist Belief: Or the Doctrinal Views of Universalists - Asher Moore
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 46
[texts]Gravity and Faster than Light Particles - Asher Yahalom
In this paper I discuss whether superluminal particles exist in the general relativistic theory of gravity. It seems that the answer to this question is negative. In truth the result may only represent a difficulty to {\bf special} but not general relativity, the later allowing both Lorentzian and Euclidian metrics. An Euclidian metric does not restrict speed. Although only the Lorentzian metric is stable \cite{Yahaloma}, an Euclidian metric can be created under special gravitational circumstanc...
Downloads: 4
[texts]Error symmetrization in quantum computers - Asher Peres
It is possible to reduce some types of quantum computation errors by symmetrizing the quantum state of a redundant array. Various models are discussed.
Downloads: 3
[texts]Reply to the comment of Y. Aharonov and L. Vaidman on ``Time asymmetry in quantum mechanics: a retrodiction paradox'' - Asher Peres
In the standard physical interpretation of quantum theory, prediction and retrodiction are not symmetric. The opposite assertion by some authors results from their use of non-standard interpretations of the theory.
Downloads: 2
[texts]How the no-cloning theorem got its name - Asher Peres
I was the referee who approved the publication of Nick Herbert's FLASH paper, knowing perfectly well that it was wrong. I explain why my decision was the correct one, and I briefly review the progress to which it led.
Downloads: 2
[texts]Quantum Disentanglement and Computation - Asher Peres
Entanglement is essential for quantum computation. However, disentanglement is also necessary. It can be achieved without the need of classical operations (measurements). Two examples are analyzed: the discrete Fourier transform and error correcting codes.
Downloads: 2
[texts]Classical interventions in quantum systems. II. Relativistic invariance - Asher Peres
If several interventions performed on a quantum system are localized in mutually space-like regions, they will be recorded as a sequence of ``quantum jumps'' in one Lorentz frame, and as a different sequence of jumps in another Lorentz frame. Conditions are specified that must be obeyed by the various operators involved in the calculations so that these two different sequences lead to the same observable results...
Downloads: 3
[texts]Nonlocal effects in Fock space - Asher Peres
If a physical system contains a single particle, and if two distant detectors test the presence of linear superpositions of one-particle and vacuum states, a violation of classical locality can occur. It is due to the creation of a two-particle component by the detecting process itself.
Downloads: 2
[texts]Classical interventions in quantum systems. I. The measuring process - Asher Peres
The measuring process is an external intervention in the dynamics of a quantum system. It involves a unitary interaction of that system with a measuring apparatus, a further interaction of both with an unknown environment causing decoherence, and then the deletion of a subsystem. This description of the measuring process is a substantial generalization of current models in quantum measurement theory...
Downloads: 7
[texts]STABILITY IN THE WEAK VARIATIONAL PRINCIPLE OF BAROTROPIC FLOWS - Asher Yahalom
I find conditions under which the "Weak Energy Principle" of Katz, Inagaki and Yahalom (1993) gives necessary and sufficient conditions. My conclusion is that, necessary and sufficient conditions of stability are obtained when we have only two mode coupling in the gyroscopic terms of the perturbed Lagrangian. To illustrate the power of this new energy principle, I have calculated the stability limits of two dimensional configurations such as ordinary Maclaurin disk, an infinite self gravitating ...
Downloads: 2
[texts]Error correction and symmetrization in quantum computers - Asher Peres
Errors in quantum computers are of two kinds: sudden perturbations to isolated qubits, and slow random drifts of all the qubits. The latter may be reduced, but not eliminated, by means of symmetrization, namely by using many replicas of the computer, and forcing their joint quantum state to be completely symmetric. On the other hand, isolated errors can be corrected by quantum codewords that represent a logical qubit in a redundant way, by several physical qubits...
Downloads: 1
[texts]A Simpler Eulerian Variational Principle for Barotropic Fluids - Asher Yahalom
The variational principle of barotropic Eulerian fluid dynamics is known to be quite cumbersome containing as much as eleven independent functions. This is much more than the the four functions (density and velocity) appearing in the Eulerian equations of motion. This fact may have discouraged applications of the variational method. In this paper a four function Eulerian variational principle is suggested and the implications are discussed briefly.
Downloads: 3
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